package com.smartfactory.sail.config;

import com.ada.base.security.CurrentUserContext;
import com.smartfactory.sail.entity.OperLog;
import com.smartfactory.sail.entity.enums.OperLogResultEnum;
import com.smartfactory.sail.service.IOperLogService;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

@Aspect
@Component
public class OperLogAspect {

    private Logger logger = LoggerFactory.getLogger(OperLogAspect.class);

    private IOperLogService iOperLogService;

    public OperLogAspect(IOperLogService iOperLogService) {
        this.iOperLogService = iOperLogService;
    }

    @Around(value = "@annotation(operRecord)", argNames = "joinPoint,operRecord")
    public Object sendState(ProceedingJoinPoint joinPoint, OperRecord operRecord) throws Throwable {
        Object proceed;
        OperLogResultEnum result = OperLogResultEnum.CZSB;
        HttpServletRequest request = ((ServletRequestAttributes) (RequestContextHolder.currentRequestAttributes())).getRequest();
        try {
            proceed = joinPoint.proceed();
            result = OperLogResultEnum.CZCG;
            return proceed;
        } finally {
            OperLogResultEnum finalResult = result;
            new Thread(() -> {
                OperLog operLog = new OperLog();
                operLog.setContent(operRecord.content());
                operLog.setLevel(operRecord.level());
                operLog.setResult(finalResult);
                operLog.setOperUser(CurrentUserContext.current().getUsername());
                operLog.setIp(getIpAddress(request));

                iOperLogService.save(operLog);
            }).start();
        }
    }

    /**
     ** 获取用户真实IP地址，不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址,
     ** 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？
     ** 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。
     **
     ** 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130,
     ** 192.168.1.100
     **
     ** 用户真实IP为： 192.168.1.110
     **
     ** @param request
     ** @return
     */
    private static String getIpAddress(HttpServletRequest request) {
        String ip = request.getHeader("X_FORWARDED_FOR");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }
}
